A radical-organometallic glycine synthon. Preparation of homochiral heterocyclic α-amino acids
摘要:
Co)Acac)2 reacts with (1) and (d)-menthyl N-BOC-2-bromoglycinates to give (1)- and (d)-menthyl N-BOC 3-acetylnorvalinates, which are converted into homochiral 2-(3,5-dimethyl-4-pyrazolyl)glycine and 2-(3,5-dimethyl)-4-isoxazolylglycine.
A radical-organometallic glycine synthon. Preparation of homochiral heterocyclic α-amino acids
摘要:
Co)Acac)2 reacts with (1) and (d)-menthyl N-BOC-2-bromoglycinates to give (1)- and (d)-menthyl N-BOC 3-acetylnorvalinates, which are converted into homochiral 2-(3,5-dimethyl-4-pyrazolyl)glycine and 2-(3,5-dimethyl)-4-isoxazolylglycine.
Commercially available (R,R)-α,α′-bis(trifluoromethyl)-9,10-anthracenedimetanol is a very efficient solvatingagent for the enantiodifferentiation of a series of chiral Michael adducts and related β-dicarbonyl compounds.